View clinical trials related to Puberty.
Filter by:The goal of this observational study is to learn about in the relationship between acne vulgaris and oral hygiene and gingivitis. The main questions it aims to answer are: - Is there a relationship between the severity of acne vulgaris lesions and the severity of plaque-related gingivitis? - Could oral hygiene or the severity of plaque-related gingivitis have an impact on the treatment of acne lesions? Participants will; - First be examined at the dermatology clinic. - Then be examined at the periodontology clinic. - Participants with severe acne vulgaris lesions will be examined a second time at the dermatology clinic. (1.5 months after the first examination) - Regularly use the antibiotic containing 100 mg doxycycline prescribed in the dermatology clinic for acne treatment. (Patients deemed suitable by the dermatologist)
Background: Earlier puberty is associated with adverse health throughout a person s life. The average age when puberty begins has been declining over the past decades in girls, and may also be declining in boys. The reasons for this shift are unknown. Objective: To determine whether internal (physical, hormonal) or external (feeding, environment) factors during infancy affect growth and the timing of puberty. Eligibility: Mothers (or other parent/guardian) and their children who completed the Infant Feeding and Early Development (IFED) study. Design: Participants will complete all activities at home for this natural history study. Participant mothers will fill out two 15-minute questionnaires: - One will be about themselves. They will answer questions about their body size in childhood, their puberty, and their pregnancies. - The other will be about their child. They will answer questions about their child s puberty and lifestyle. Child participants will fill out a questionnaire about their body changes during puberty. This will take 10 minutes. Participants will be sent an electronic scale and a measuring tape. They will measure the child s weight, height, and waist and hip circumference. These numbers can be submitted online or by phone or mail. Participants will receive a kit for collecting urine samples. Child participants will collect urine in a cup upon waking 4 days in a row. A special filter card is dipped in the cup then hung to dry. The dried cards will be mailed back. Participants will allow researchers to access their child s medical records. Questionnaires and body measurements will be repeated after 6 and 12 months. Urine sample collection will be repeated after 12 months. All questionnaires can be done either online, by mail, or by phone on request.
Early diabetic kidney disease (DKD) occurs in 50-70% of youth with type 2 diabetes (T2D) and confers high lifetime risk of dialysis and premature death. Youth-onset T2D typically manifests during or shortly after puberty in adolescents with obesity. Epidemiological data implicate puberty as an accelerator of kidney disease in youth with obesity and diabetes and the investigators posit that the link between puberty and T2D-onset may explain the high burden of DKD in youth-onset T2D. A better understanding of the impact of puberty on kidney health is needed to promote preservation of native kidney function, especially in youth with T2D.
The COPENHAGEN School Study is a combined cross-sectional and longitudinal study of healthy Danish school children. This study will by clinical examinations and withdrawal of blood samples investigate whether age of pubertal onset is continuing to decline in Denmark over the past 15 years. Furthermore, we will investigate the mechanism driving earlier onset of puberty and the long term health risks of extremely early puberty using Danish registry data
The purpose of this study is to determine if, in mid- to late pubertal girls with hyperandrogenism (HA), androgen-receptor blockade (spironolactone) alone normalizes sleep-wake luteinizing hormone (LH) pulse frequency (primary endpoint) and overall LH and follicle-stimulating hormone secretion (secondary endpoints).
Establishment of regular menstrual cycles is a key component of reproductive maturation and a recognized vital sign for health and well-being. Irregular menstrual cycles are especially common for the first 2-3 years after an adolescent's first menstrual period (i.e., menarche), which delays the identification and diagnosis of early reproductive disturbances such as polycystic ovary syndrome (PCOS). The purpose of this research study is to determine whether the ovary can serve as a reliable predictor of normal or abnormal development by following the trajectory of ovarian morphology in conjunction with menstrual cyclicity using 3D transabdominal ultrasound imaging in a prospective cohort study of adolescents. A secondary objective is to identify potential environmental factors such as diet and the gut microbiome which influence the trajectory towards normal or abnormal reproductive development.
Children and adolescents experiencing gender dysphoria feel increased distress with the onset of puberty. Gender clinics treat these young adolescents by "blocking" puberty using gonadotropin-releasing hormone (GnRH) agonist medications. This has the possibility of impacting bone development as sex steroids are important to bone mass development. In this multi-site study, the investigators will examine bone marrow composition (by MRI) in 40 transgender youth and bone density and body composition before/after pubertal blockade compared to healthy participants.
The purpose of this study is to determine if, in mid- to late pubertal girls with hyperandrogenism, androgen-receptor blockade (spironolactone) improves the ability of progesterone to acutely reduce waking luteinizing hormone pulse frequency (primary endpoint).
Polycystic ovary syndrome (PCOS) is a common disorder marked by hyperandrogenism, oligo-/anovulation, and subfertility. The precise causes of PCOS are unclear, but the pathophysiology involves complex genetic and environmental influences. Importantly, not all girls with obesity have HA, and free testosterone (T) concentrations are highly variable in this group. Luteinizing hormone (LH) and insulin concentrations are significant but only partial predictors of free T in girls with obesity; significant unexplained variability in free T suggests that additional factors contribute to HA in this population. Abnormalities of ovarian and adrenal steroidogenesis are likely contributors in this regard, but such abnormalities are difficult to quantify. Recent Genome Wide Association Studies have identified DENND1A as a PCOS susceptibility gene candidate. Preliminary in vitro data strongly implicate a DENND1A splice variant called DENND1A Variant 2 (DENND1A.V2) as a contributor to excessive theca cell androgen production in PCOS. The investigators' primary goal with the proposed pilot study is to determine the relationship between urinary exosomal DENND1A.V2 mRNA and free T concentrations in peripubertal girls. The investigators hypothesize that urinary exosomal DENND1A.V2 mRNA quantity is a significant and independent predictor of peripubertal hyperandrogenemia. In this study, the investigators will carefully phenotype peripubertal girls with and without hyperandrogenemia (primarily in the form of hormonal, maturational, and anthropometric measurements) in addition to measuring urinary exosomal DENND1A.V2 mRNA. As a primary analysis, the investigators will examine the relationship between morning free testosterone and urinary exosomal DENND1A.V2, controlling for previously-described partial predictors of free testosterone (LH, insulin) in addition to potential confounders (BMI z-score, bone age). These studies will provide important information regarding the etiology of HA in peripubertal girls. Ultimately, these data may lead to a non-invasive test of ovarian/adrenal steroidogenic activity and support the development of a diagnostic test for PCOS in high-risk peripubertal girls (e.g., those with obesity).
Background: Studies suggest that overweight girls may be developing breast tissue, and therefore starting puberty, earlier than normal weight girls. However, it is hard to distinguish breast tissue from fatty tissue. Researchers think that by using breast ultrasound, among other tests, they can do a better job of telling whether an overweight girl has breast tissue. This will help them understand if overweight girls are truly entering puberty before normal weight girls. Objective: To find out if overweight girls go through puberty earlier than normal weight girls. Eligibility: Healthy girls 8-14 years old who: - Are normal weight or overweight - Have some breast development - Have not started their first period Design: Parents of participants will be screened over the phone. Most participants will have 1 visit. However, they can choose to have multiple visits within 4 weeks. The visit will include: - Physical exam that includes examination of the breasts and genital area - Breast ultrasound: A small hand-held device will be passed back and forth over the chest. It uses sound waves to create a picture of the breast tissue. - Pelvic ultrasound: A small, handheld device will be passed back and forth over the lower belly. It uses sound waves to create a picture of the ovaries. - Urine and blood test - A special x-ray called a DXA to measure the amount of fat in the body: The participant will lie still on a table while the x-ray takes pictures of the body. X-ray of the hand: The picture will tell researchers how mature the participant s bones are. Participants may be asked to come back 6 months later to repeat these tests.